defmodule Entendu.Application do
  # See https://hexdocs.pm/elixir/Application.html
  # for more information on OTP Applications
  @moduledoc false

  use Application

  def start(_type, _args) do
    topologies = [
      k8s_entendu: [
        strategy: Elixir.Cluster.Strategy.Kubernetes.DNS,
        config: [
          service: "entendu-nodes",
          application_name: "entendu"
        ]
      ]
    ]

    children =
      case Application.get_env(:frayt_elixir, :enable_k8s) do
        true ->
          [
            {Cluster.Supervisor, [topologies, [name: Entendu.ClusterSupervisor]]}
          ]

        _ ->
          []
      end
      |> Kernel.++([
        # Start the Ecto repository
        Entendu.Repo,
        # Start the Telemetry supervisor
        EntenduWeb.Telemetry,
        # Start the PubSub system
        {Phoenix.PubSub, name: Entendu.PubSub},
        # Start the Endpoint (http/https)
        EntenduWeb.Endpoint
        # Start a worker by calling: Entendu.Worker.start_link(arg)
        # {Entendu.Worker, arg}
      ])

    # See https://hexdocs.pm/elixir/Supervisor.html
    # for other strategies and supported options
    opts = [strategy: :one_for_one, name: Entendu.Supervisor]
    Supervisor.start_link(children, opts)
  end

  # Tell Phoenix to update the endpoint configuration
  # whenever the application is updated.
  def config_change(changed, _new, removed) do
    EntenduWeb.Endpoint.config_change(changed, removed)
    :ok
  end
end